Method and system for diagnosis and control of machines using connectionless modes of communication

ABSTRACT

A method and system of remotely monitoring and controlling machines and business office devices such as copiers, printers, and facsimile machines. Outgoing messages, such as Internet e-mail messages containing information describing the business office device are monitored by a security center. The security center either receives an unencrypted form of the message, or alternatively receives an encrypted form of the message. If the message is encrypted, it will be necessary for the security center to first decrypt the message. The contents of the message are monitored by the security center to assure that only authorized information is transmitted from an authorized business office device, over the Internet, to a data center which monitors the status of and/or controls the business office device. A log of messages passing through a firewall to the Internet is maintained and compared with messages received by the security center to assure that only messages which have been received by the security center and checked are transmitted through the firewall over the Internet.

CROSS-REFERENCES TO RELATED APPLICATIONS

The present application is related to U.S. patent application Ser. No. 08/624,228 filed Mar. 29, 1996 entitled "Method and System for Controlling and Communicating with Machines Using Multiple Communication Formats" now U.S. Pat. No. 5,818,603, U.S. patent application Ser. No. 08/463,002 filed Jun. 5, 1995 entitled "Method and System for Diagnosis and Control of Machines Using Connection and Connectionless Modes of Communication" now U.S. Pat. No. 5,819,110, and U.S. patent application Ser. No. 08/693,068 filed Aug. 15, 1996 entitled "Method and Apparatus for Controlling and Communicating With Business Office Devices" now U.S. Pat. No. 5,649,120, which is a continuation of U.S. patent application Ser. No. 08/562,192 filed Nov. 22, 1995 now U.S. Pat. No. 5,568,618, which is a continuation of U.S. patent application Ser. No. 08/473,780 filed Jun. 6, 1995, entitled "Method and Apparatus for Controlling and Communicating With Business Office Devices", now U.S. Pat. No. 5,544,289, which is a continuation of U.S. patent application Ser. No. 08/426,679 filed Apr. 24, 1995, now U.S. Pat. No. 5,537,554, entitled "Method and Apparatus for Controlling and Communicating With Business Office Devices" which is a continuation of U.S. patent application Ser. No. 08/282,168 filed Jul. 28, 1994 and entitled "Method and Apparatus for Controlling and Communicating With Business Office Devices", now U.S. Pat. No. 5,412,779, which is a continuation of U.S. patent application Ser. No. 07/902,462 filed Jun. 19, 1992, now abandoned, which is a continuation of U.S. patent application Ser. No. 07/549,278, filed Jul. 6, 1990, now abandoned, the disclosure of each is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is related to the remote monitoring, diagnosis and control of machines using connection and connectionless modes of communication and is more particularly related to monitoring, the control and diagnosis of business office machines such as copiers, printers, and facsimile machines.

The invention is further related to assuring that outgoing connectionless communications are authorized and secure.

2. Discussion of the Background

U.S. Pat. No. 5,412,779 discloses the controlling of business office devices by a remote diagnostic station. However, the method of communication in this system and other known systems for controlling machines such as business office machines is to establish a connection between the machine and the diagnostic station and to use a connection-mode of communication.

The use of a dedicated communication connection between the machine and diagnostic station is more expensive as compared to the use of the Internet. On the other hand, the Internet has disadvantages in that some forms of communication over the Internet are slow and may be delayed, and have a problem in that the Internet is not a secure mode of transmission (i.e., communications may be monitored by others). In addition, the connection-mode access to an installed machine from the Internet may not be possible because of a security block by a firewall. However, even with the delays of a connectionless-mode of communication over the Internet, the inventor has found that the Internet can still provide a suitable medium for communication for some applications.

SUMMARY OF THE INVENTION

Accordingly, it is one object of the invention to provide a connectionless-mode of transmission between a machine and a remote diagnostic station. It is a further object of the invention to provide a method and system to assure that outgoing connectionless communications are authorized and secure.

These and other objects are accomplished by a method and system which monitors outgoing communications from a machine such as a business office device which includes a facsimile machine, copier, or printer. The message to be transmitted from the business office device over the Internet to a data center which monitors the status and parameters of the business office device is transmitted to a security center, preferably over a local area network, before transmission through a firewall device over the Internet. The security center monitors the information to assure that the information which is being transmitted is permissible and is being transmitted to an authorized destination.

The message received by the security center is either encrypted or unencrypted. If the message is encrypted, it must be first decrypted at the security center. Subsequently, the data within the message is analyzed. A software program may be utilized at the security center in order to determine the contents of the outgoing message which maybe in binary form. The software program is needed because the outgoing message is a transmission between two machines and the contents thereof are not readily understandable by a human. The monitoring of outgoing messages assures that only data of a specific machine(s) is transmitted and that no other data, possibly disguised as a message from a business office device, is transmitted.

Additionally, a log of outgoing messages through a firewall device to the Internet is maintained. This log is compared with the messages received by the security center to assure that all outgoing messages from business office devices are received by the security center.

If it is determined that it is acceptable to transmit the message, an encrypted form of the message is transmitted over the Internet, preferably in the form of an e-mail message, although other types of messages and communication mediums can be used. The security group stores and archives the outgoing messages in order to be able to monitor the history of a machine, if desired, and also to be able to search for past security breaches.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:

FIG. 1 illustrates three networked business office machines connected to a network of computers and data bases through the Internet;

FIG. 2 illustrates the components of a digital copier/printer;

FIG. 3 illustrates electronic components of the digital copier/printer illustrated in FIG. 2;

FIG. 4 illustrates details of the multi-port communication interface illustrated in FIG. 3;

FIG. 5 illustrates a process performed when a machine is initially installed;

FIG. 6 illustrates a process for determining whether an incoming communication to the machine requires ordinary action or is for remote monitoring, diagnosis and control;

FIG. 7 is a data flow diagram of communications to and from the machine;

FIG. 8 is a flowchart illustrating the process of the data flow diagram of FIG. 7;

FIG. 9 is a flowchart illustrating the processing performed when communication is initiated by the machine;

FIG. 10 illustrates connectionless communication from the machine to the remote monitoring device;

FIG. 11 illustrates a connection-mode of transmission between the monitoring device and the machine being monitored;

FIG. 12A illustrates the main components of the service data base;

FIG. 12B illustrates information of an attachment and options data base;

FIG. 12C illustrates a data base used for keeping track of the history of various machines;

FIGS. 13A and 13B are a flowchart illustrating a first embodiment of monitoring outgoing messages from a business office device to a data center by a security center; and

FIG. 14 is a flowchart illustrating a second embodiment of monitoring outgoing messages from a business office device to a data center by a security center.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawings, wherein like numerals designate identical or corresponding parts throughout the several views, and more particularly to FIG. 1 thereof, there is illustrated a figure showing various machines and computers for monitoring, diagnosing and controlling the operation of the machines. In FIG. 1, there is a first network 16, such as a Local Area Network (LAN) connected to computer workstations 17, 18, 20 and 22. The workstations can be any type of computers including IBM Personal Computer compatible devices, Unix Based Computers, or Apple Macintoshes. Also connected to the network 16 are a digital copier/printer 24, a facsimile machine 28, and a printer 32. The devices 24, 28 and 32 are referred to as machines or monitored devices and other types of devices may be used as the machines or monitored devices. Also, a facsimile server (not illustrated) may be connected to the network 16 and have a telephone or ISDN (Integrated Services Digital Network) connection. In addition to the digital copier/printer 24, facsimile machine 28, and printer 32 being connected to the network 16, these devices may also include conventional telephone and/or ISDN connections 26, 30 and 34, respectively. As is explained below, the business office machines or business devices 24, 28 and 32 communicate with a remote monitoring, diagnosis and control station, also referred to as a monitoring device, through the Internet via the network 16 or by a direct telephone or ISDN connection.

In FIG. 1, the Internet is generally designated by 10. The Internet 10 includes a plurality of interconnect computers designated by 12A-12I. The manner of communicating over the Internet is known through RFC documents obtained by FTP at NIC.DDN.MIL or at FTP NISC.SRI.COM. TCP/IP related communication is described for example in the book "TCP/IP Illustrated," Vol. 1, The Protocols, by Stevens, from Addison-Wesley Publishing Company, 1994. As the Internet is a network accessible by many people and organizations, it is not considered to be secure, therefore, messages transmitted over the Internet should be encrypted to keep the messages confidential. Encryption mechanisms are known and commercially available which may be used with the present invention. For example, a C library function, crypt(), is available from Sun Microcomputers for use with the Unix operating system, and other encryption and decryption routines are known and commercially available.

An additional security measure used in connecting a computer network to the Internet is a protective device known as a firewall. This device allows only authorized computers to access a network or other computer via the Internet. Firewalls are known and commercially available devices and, for example, include SunScreen™ from Sun Microsystems Inc.

In FIG. 1, a firewall 14 is connected between the Internet 10 and the network 16. Similarly, a firewall 50 is connected between the Internet 10 and a network 52. Also, a firewall 40 is connected between the Internet 10 and a workstation 42.

The network 52 is a conventional network and includes a plurality of workstations 56, 62, 68 and 74. These workstations may be different departments within a company such as a marketing, manufacturing, design engineering and customer service departments. In addition to the workstations connected via the network 52, there is a workstation 42 which is not directly connected to the network 52. Information in a data base stored in a disk 46 may be shared using proper encryption and protocols over the Internet to the workstations connected directly to the network 52. Also, the workstation 42 includes a direct connection to a telephone line and/or ISDN 44 and the data base in disk 46 may be accessed through the telephone line or ISDN.

Information of the business office machines 24, 28 and 32 may be stored in one or more of the data bases stored in the disks 46, 54, 58, 64, 70 and 76. Each of the customer service, marketing, manufacturing, and engineering departments may have their own data base or may share from one or more data bases. Each of the disks used to store data bases is a non-volatile memory such as a hard disk or optical disk. As an example, disk 64 contains the marketing data base, disk 58 contains the manufacturing data base, disk 70 contains the engineering data base and disk 76 contains the customer service data base. Alternatively, the disks 54 and 46 store one or more of the data bases.

In addition to the workstations 56, 62, 68, 74 and 42 being connected to the Internet, these workstations may also include a connection to a telephone line or ISDN which provides a secure connection to the machine being monitored diagnosed and/or controlled and is used during a connection-mode of communication. Additionally, if one of the Internet, and telephone or ISDN is not operating properly, the other can be automatically used for communication An important feature of the present invention is the use of a connectionless-mode of communication or transmission between a machine and a computer for diagnosing and controlling the machine. The IBM Dictionary of Computing by George McDaniel, 1994, defines a connectionless-mode transmission to be the transmission of a single unit of data from a source service access point to one or more destination service access points without establishing a connection. The IBM Dictionary also defines a connection-mode transmission to be the transmission of units of data from a source service access point to one or more destination service access points via a connection. The connection is established prior to data transfer and released following data transfer. Additional information about the connection-mode and the connectionless-mode of operation is described in the Handbook of Computer-Communications Standards, Vol. 1, 2nd Edition, by William Stallings, 1990, which is incorporated herein by reference.

FIG. 2 illustrates the mechanical layout of the digital copier/printer 24 illustrated in FIG. 1. In FIG. 2, 101 is a fan for the scanner, 102 is a polygonal mirror used with a laser printer, and 103 designates an FE lens used to collimate light from a laser (not illustrated). Reference numeral 104 designates a sensor for detecting light from the scanner, 105 is a lens for focussing light from the scanner onto the sensor 104, and 106 is a quenching lamp used to erase images on the photoconductive drum 132. There is a charging corona unit 107 and a developing roller 108. Reference numeral 109 designates a lamp used to illustrate a document to be scanned and 110, 111 and 112 designate mirrors used to reflect light onto the sensor 104. There is a drum mirror 113 used to reflect light to the photoconductive drum 132 originating from the polygon mirror 102. Reference numeral 114 designates a fan used to cool the charging area of the digital copier/printer, and 115 is a first paper feed roller used for feeding paper from the first paper cassette 117, and 116 is a manual feed table. Similarly, 118 is a second paper feed roller for the second cassette 119. Reference numeral 120 designates a relay roller, 121 is a registration roller, 122 is an image density sensor and 123 is a transfer/separation corona unit. Reference numeral 124 is a cleaning unit, 125 is a vacuum fan, 126 illustrates a transport belt, 127 is a pressure roller, and 128 is an exit roller. Reference numeral 129 is a hot roller used to fix toner onto the paper, 130 is an exhaust fan and 131 is the main motor used to drive the digital copier.

FIG. 3 illustrates a block diagram of the electronic components illustrated in FIG. 2. The CPU 160 is a microprocessor and acts as the system controller. There is a random access memory 162 to store dynamically changing information including operating parameters of the digital copier. A read only memory 164 stores the program code used to run the digital copier and also information describing the copier (static-state data) such as the model number and serial number of the copier.

There is a multi-port communication interface 166 which allows the digital copier to communicate with external devices. Reference numeral 168 represents a telephone or ISDN line and 170 represents a network. Further information of the multi-port communication interface is described with respect to FIG. 4. An interface controller 172 is used to connect an operation panel 174 to a system bus 186. The operation panel 174 includes standard input and output devices found on a digital copier including a copy button, keys to control the operation of the copier such as number of copies, reducement/enlargement, darkness/lightness, etc. Additionally, a liquid crystal display is included within the operation panel 174 to display parameters and messages of the digital copier to a user.

A storage interface 176 connects storage devices to the system bus 186. The storage devices include a flash memory 178 which is a conventional EEPROM and a disk 182. The disk 182 includes a hard disk, optical disk, and/or a floppy disk drive. There is a connection 180 connected to the storage interface 176 which allows for additional memory devices to be connected to the digital copier. The flash memory 178 is used to store semi-static state data which describes parameters of the digital copier which infrequently change over the life of the copier. Such parameters include the options and configuration of the digital copier. An option interface 184 allows additional hardware such as an external interface to be connected to the digital copier.

On the left side of FIG. 3, the various sections making up the digital copier are illustrated. Reference numeral 202 designates a sorter and contains sensors and actuators used to sort the output of the digital copier. There is a duplexer 200 which allows a duplex operation to be performed by the digital copier and includes conventional sensors and actuators. The digital copier includes a large capacity tray unit 198 which allows paper trays holding a large number of sheets to be used with the digital copier. The large capacity tray unit 198 includes conventional sensors and actuators.

A paper feed controller 196 is used to control the operation of feeding paper into and through the digital copier. A scanner 194 is used to scan images into the digital copier and includes conventional scanning elements such as a light, mirror, etc. Additionally, scanner sensors are used such as a home position sensor to determine that the scanner is in the home position and a lamp thermistor to ensure proper operation of the scanning lamp. There is a printer/imager 192 which prints the output of the digital copier and includes a conventional laser printing mechanism, a toner sensor, and an image density sensor. The fuser is used to fuse the toner onto the page using a high temperature roller and includes an exit sensor, a thermistor to assure that the fuser is not overheating, and an oil sensor. Additionally, there is an optional unit interface 188 used to connect to optional elements of the digital copier such as an automatic document feeder, a different type of sorter/collator, or other elements which can be added to the digital copier.

FIG. 4 illustrates details of the multi-port communication interface 166. The digital copier may communicate to external devices through a Centronics interface 220 which receives or transmits information to be printed, a SCSI interface 222, a conventional telephone interface 224 which connects to a telephone line 168A, an ISDN interface 226 which connects to an ISDN line 168B, an RS-232 interface 228, and a LAN interface 230 which connects to a LAN 170. A single device which connects to both a Local Area Network and a telephone line is commercially available from Megahertz and is known as the Ethernet-Modem.

The CPU or other microprocessor or circuitry executes a monitoring process to monitor the state of each of the sensors of the digital copier, and a sequencing process is used to execute the instructions of the code used to control and operate the digital copier. Additionally, there is a central system control process executed to control the overall operation of the digital copier and a communication process used to assure reliable communication to external devices connected to the digital copier. The system control process monitors and controls data storage in a static state memory such as the ROM 164 of FIG. 3, a semi-static memory such as the flash memory 178 or disk 182, or the dynamic state data which is stored in a volatile or non-volatile memory such as the RAM 162 or the flash memory or disk 182. Additionally, the static state data may be stored in a device other than the ROM 164 such as a non-volatile memory including either of the flash memory 178 or disk 182.

The above details have been described with respect to a digital copier but the present invention is equally applicable to other business office machines such as a facsimile machine, a scanner, a printer, a facsimile server, or other business office machines. Additionally, the present invention includes other types of machines which operate using a connection-mode or connectionless-mode of communication such as a metering system including a gas, water, or electricity metering system, vending machines, or any other device which performs mechanical operations, has a need to be monitored, and performs a function. In addition to monitoring special purpose machines, and computers, the invention can be used to monitor, control, and diagnose a general purpose computer.

FIG. 5 illustrates a flowchart containing a process which is performed for a new machine such as a business office device in order to have it properly recognized by diagnostic, monitoring, and control equipment. After starting, step 250 has a user or device assign a name and address to the machine. In order for the device to transmit or receive communications, it is necessary to know where to send the communication and from where the communication originates. Step 252 stores the name and address in the semi-static state memory such as the flash memory 178 or the disk 182 illustrated in FIG. 3. This information is used both for a connection-mode of communication via a telephone or ISDN line, a connectionless-mode of communication such as using a conventional Internet electronic mail protocol, and also to have communication to the machine for ordinary purposes such as using the digital copier/printer for printing jobs via the local area network.

Once the information for the machine has been determined and then stored in step 252, it is necessary to register this information so that other devices will be able to access the machine. Therefore, the name and address of this device are registered in a mail server, for example, which will send and receive electronic mail for the network to which the mail server is connected. It is also desirable to register the machine as part of the local area network. Further, the monitoring devices to which the machine transmits messages are registered with the machine. Last, the machine is registered with a computer of a customer service department or other remote monitoring, controlling and/or diagnosing computer in order for the remote device to properly monitor and be aware of the existence of the machine. Step 256 sends a message to a service department or one of the other divisions illustrated in FIG. 1 in order to register the name, address, model number, serial number, or other information and capabilities of the machine in the customer service or another type of data base.

FIG. 6 illustrates a flowchart for determining the source of communication to the machine such as a business office device. After starting, step 260 determines if the input is for a system operation, or alternatively for a diagnosis, monitoring, or remote control operation. If the input is determined to be for the system in step 260, step 262 sets the input channel for ordinary system input processing. For example, if the machine were a printer, the received information would be used to produce a print job. If step 260 determines that the input is not for the system but for control, monitoring, or diagnosis of the machine, step 264 searches for an appropriate application for the input. A typical application would be a process for monitoring or testing of the machine. Step 266 examines if the application which was searched for is found and if it was not, an error is indicated. Otherwise, step 268 sets the input channel for the application input processing and the system is ready to process the incoming information.

FIG. 7 illustrates a data flow diagram which processes incoming messages to and outgoing messages from a machine such as the digital copier/printer. A direct connection process 270 is used to process incoming and outgoing communications in a connection-mode of communication such as through a local area network, telephone line, or ISDN line. Incoming messages pass through buffer 274 to a parsing process 292 which performs parsing of incoming information in a known and conventional manner. The incoming information causes various actions such as the actions illustrated in 294, 296 and 298 to occur. Some actions require that a message be returned and the returned message is illustrated by the arrows leading to buffer 300. An output message process is performed which prepares an outgoing message to either the direct connection or connectionless process. The direct connection process passes through buffer 272 before passing through the direct connection process 270.

For a connectionless-mode of communication, there is a connectionless input process 276 and a connectionless output process 278. Incoming connectionless-mode communications pass through buffer 280 and a decryption process is performed in step 284. The decrypted information is stored in buffer 286 and passed to a conventional parsing process 292. As explained above, one or more of the actions 294, 296 and 298 are performed and outgoing messages pass through the buffer 300 to the output message process 302. Then, the connectionless-mode outgoing messages pass through a buffer 290, after which they are encrypted by the encryption process 288. The encrypted messages then pass through buffer 282 and are transmitted via the connectionless output process 278 over a connectionless network such as the Internet to their final destination.

Any type of a connectionless-mode of communication may be used by the present invention. An inexpensive and readily available medium through which connectionless messages may pass is the Internet processing electronic mail messages. The connectionless input and output processes may be according to any known Internet e-mail protocol such as used by the BSD Unix mail system which is incorporated into the SunOS 4.1.X. Also, other information describing Internet e-mail operations are readily available through various sources on the Internet itself. While the Internet provides an inexpensive manner of a connectionless-mode of communication, the Internet electronic mail system may be slow or unreliable and therefore, in certain circumstances, instead of using a connectionless process, a direct connection process as described below, is performed.

FIG. 8 illustrates a flowchart which may be used to implement the data flow diagram illustrated in FIG. 7. After starting, step 340 determines if decryption is needed and if it is, a decryption routine is performed in step 342. Step 344 then calls a parser which parses in a conventional manner and step 346 determines if any action needs to be taken. If it does, for example when information is to be transmitted back to the remote monitoring, diagnosis, or control device, step 348 calls the required routine. Step 350 determines if more processing is needed and flow returns back to step 340 for further processing. Otherwise, flow returns to the calling process.

FIG. 9 illustrates a process performed within the machine which determines whether a connection-mode or a connectionless-mode of communication is needed. After starting, step 370 determines if an event requires communication and if it does not, flow returns to the calling process. If communication is needed, step 372 determines whether the event requires a connectionless-mode or a connection-mode of transmission. Any type of high priority event for which immediate attention is needed or which the remote monitoring device would be interested in on an expedited basis is sent in a connection-mode of communication. This may be used when a hazardous connection exists within the machine or when something in the machine needs immediate attention. For example, if a thermistor in the fuser unit senses a high and unsafe temperature, a direct connection mode may be used. However, the transmission of a weekly or monthly report indicating the usage and a normal condition state in the machine can use the slower connectionless-mode of communication. Additionally, when the connectionless mode of communication is not properly functioning, the connection-mode of communication is used. For example, if an Internet e-mail message is not properly received by the monitoring device, a direct connection-mode of communication is used. The e-mail message may contain a request for acknowledgement of receipt and if an acknowledgement is not received within a predetermined time (e.g. 3-24 hours) then a connection-mode communication is used to re-transmit the message. Also, if a connection-mode of communication is not properly functioning, then the connectionless-mode of communication may be used.

If step 372 determines that an event does not require a connectionless-mode of communication, step 376 determines if the direct communication channel is ready. For example, it determines if the telephone or ISDN line is available. If it is, a direct communication process is performed in step 378 to transmit the appropriate information. If the direct channel is not ready, step 380 notifies the user through the operation panel that there is a problem with the telephone, ISDN, or other direct connection device or communication medium. If step 372 determines that the event requires a connectionless-mode of transmission, step 374 calls a connectionless communication process. The process of FIG. 9 then returns to the calling process.

FIG. 10 illustrates a connectionless-mode of communication initiated by the machine which is being remotely diagnosed, controlled, and monitored. Initially, the monitored device transmits its identity in step 390. The monitored device then requests an analysis of the density information of the digital copier in step 394. The monitoring device analyzes the density information for the specific digital copier corresponding to the transmitted identity in order to determine if the print density of the digital copier is too dark or too light. Step 396 then transmits the results of the density analysis back to the monitored device. If the process of FIG. 10 used a connection-mode of communication, the monitoring device would execute step 392 which acknowledged receipt of the identity information and step 394 would not be performed until the acknowledgement was received. However, in a connectionless-mode of communication, step 392 is not performed and the transmission of the identity would be immediately followed by the request for analysis.

As with the business office machine, the remote device for controlling, diagnosing, and monitoring the machine may initiate either a connection-mode or connectionless-mode of communication. As with the machine, when the remote monitoring device needs to send urgent information or needs an urgent response from the machine, a connection-mode of communication is used. When time is not critical, the remote device may use a connectionless-mode of communication. For example, if new control software needs to be downloaded to the business office machine due to a bug in the program in the business office machine which causes a dangerous condition, a direct connection-mode of communication will be used. Also, as described with respect to the monitored device, if the monitoring device experiences a problem with one of the modes of communication, one of the other modes may be used.

FIG. 11 illustrates a connection-mode of communication initiated by the monitoring device. Initially, step 400 requests the identity of the monitored device and the monitored device transmits its identity in step 402. In step 404, the monitoring device verifies the identity and looks up the capabilities of the identified device in a data base. The data base describes various information of the monitored device or machine such as service history, optional equipment, usage information, or other information. In step 406, the monitoring device requests image density information from the monitored device. In step 408, the monitored device receives the request for image density information, determines the image density information (or looks up previously stored image density information) and transmits the image density information back to the monitoring device in step 408. In step 410, the monitoring device analyzes the received information (i.e., compares the received information with information looked up in the data base) and determines that it is appropriate to change parameters of the monitored device. Step 412 requests parameters of the device to be changed and transmits an appropriate command. In step 414, the monitored device changes its operating parameters in accordance with the received command.

FIGS. 12A through 12C illustrate various data base structures which may be used by the invention. FIG. 12A illustrates a simple data base 440 containing the machine ID 442, the model number 444, the serial number 446, a command level 448, and an address 450. The ID 442 is a unique describer of the device and used to link various data bases describing the device such as the data bases illustrated in FIGS. 12B and 12C. The command level 448 indicates whether the machine can process simple or complex instruction sets. The address 450 contains the connection and connectionless address information including the network address, phone number, name, and any other information necessary to identify the machine

Linked to the data base in FIG. 12A are the data bases in FIGS. 12B and 12C which respectively describe attachment information and the history of the machine. The data base structure 460 illustrated in FIG. 12B is for attachments and options for machines contained in the data base of FIG. 12A and contains an ID field 462 which corresponds to the ID field 442 of FIG. 12A. The attachment ID field 464 indicates the type of optional attachments connected to the machine such as a sorter, automatic document feeder, or other attachment. The attachment serial number 446 is the serial number of the attachment connected to the machine. The attachment ID field may be linked to a data base describing various features of the attachment data base. Other fields may be contained in the attachment and option data base 460.

The history of the machine is stored in a separate data base illustrated in FIG. 12C. The data base structure 470 again contains an ID field 472 which is used to link the various data bases. A date and time field 474 and an information field 476 is used to describe malfunctions or other special conditions and events within the machine including the date and time at which an event occurred.

The data bases as illustrated in FIGS. 12A-12C are illustrative of the type of information which is stored regarding the machine. Even though illustrated as separated data bases, the implementation of the data bases may include more or less data bases. Different departments within a company may maintain different data bases describing information about the various machines. The service data base will be most complete about individual machines, contain a complete service history of each machine, and may be stored at a customer service division. Separate manufacturing, engineering and marketing department data bases may be maintained and use the information generated from the machine. The different data bases may be linked through different fields. For example, the service data base may be linked to the manufacturing data base through the serial and model numbers. The manufacturing data base and engineering data base may be linked through a version and model number, and the service data base and engineering data base may be linked through model numbers. Any type of known data base scheme may be used to maintain and share information, as needed.

Separate analysis and decision software may be created which allows a user to make a specific inquiry into any one or more of the data bases. The user may formulate any type of query and the data bases searched to produce the requested information. The analysis and decision software is also used to generate monthly or other regular reports describing information of the machines and may generate an alert or other type of warning when a malfunction occurs.

                  TABLE 1A     ______________________________________            Monthly Report Message From Copiers     ______________________________________            Copy count and job count            List of changed parts detected            List of parameters changed            Use of duplexing            Use of reduction            Use of enlargement            Copy counts for various paper sizes            Use of manual feed     ______________________________________

                  TABLE 1B     ______________________________________            Monthly Report Message From Printers     ______________________________________            Copy count and job count            List of changed parts/supplies            List of set up changes            Use of duplexing if available            Copy counts for various paper sizes            Numbers of jobs for various printer            languages such as PCL5 and Postscript            Use of manual feed     ______________________________________

                  TABLE 1C     ______________________________________     Monthly Report Message From Facsimile Machines     ______________________________________     Number of transmissions and receptions     Number of pages sent     Number of pages received     Counts for special features such as speed     dials     ______________________________________

Tables 1A-1C illustrate monthly report messages which may be generated for copiers, printers, and facsimile machines. These monthly reports simply show the parameters, usage, and other information of the machines and of course may be different and include more or less information, as desired.

                  TABLE 2     ______________________________________     Communication Commands                                T: Target,     Operator          Operands V: Value     ______________________________________     Set               T V     Get               T     Report            T V     Set.sub.-- List   T.sub.1 V.sub.1, T.sub.2 V.sub.2, . . . , T.sub.n                       V.sub.n     Get.sub.-- List   T.sub.1 T.sub.2, . . . , T.sub.n     Report.sub.-- List                       T.sub.1 V.sub.1, T.sub.2 V.sub.2, . . . , T.sub.n                       V.sub.n     Copy.sub.-- Memory.sub.-- To.sub.-- Memory                       Source Destination Num.sub.-- Byte     Copy.sub.-- Memory.sub.-- To.sub.-- Disk                       Source Name Num.sub.-- Byte     Copy.sub.-- Disk.sub.-- To.sub.-- Memory                       Name Destination     Command.sub.-- Not.sub.-- Understood                       Operator and Operands     ______________________________________

Table 2 illustrates various communication commands which may be used to implement the communication operations described herein. The left-side of the table contains the operators and the right-side of the table contains the operands. In the table, T indicates a target which is a specific address, parameter, sensor, or stored data, and V is a value. The commands illustrated in Table 2 are the set command which allows a specific address, parameter, or stored data to be set to the value contained in V. Similarly, the get command allows specific target information to be obtained. The report operator is included in a report from the monitored machine of information requested by the get operator. The set₋₋ list, get₋₋ list and report₋₋ list allow more than one target and value to be obtained, set or generated using a single operator. The illustrated copy commands allow information to be copied from one memory address to another memory address, from a memory address to a disk, and from a disk to a memory location. The command₋₋ not understood operator indicates that a specific operator and/or operand(s) was not understood.

                  TABLE 3A     ______________________________________     Commands to Copier     ______________________________________     get              id;     set              sorter yes;     set              adf  yes;     get              configuration;     get              A100;     set              A100  FFAA;     get              copy.sub.-- count;     get              jam-count;     get              last.sub.-- toner-change;     set              boot A100;     ______________________________________

                  TABLE 3B     ______________________________________     Response from Copier     ______________________________________     report       id  AX301B3330;     report       configuration LIST (sorter yes, adf                  yes, large.sub.-- capacity.sub.-- tray no , . . . );     report       A100  AABB;     report       A100  FFAA;     report       copy-count 9895;     report       jam-count 0;     report       last.sub.-- toner.sub.-- change  12Apr95;     ______________________________________

Table 3A illustrates commands which may be sent to a copier from a remote monitoring and diagnostic device and Table 3B illustrates the response from the copier after receiving the commands of Table 3A. After the get id command in Table 3A, the response from the copier is a report of the id which is AX301B3330;. The second line of Table 3B illustrates the use of "LIST". In this case, the configuration includes more than one target parameter and therefore, the group of target parameters and their value are preceded by the "LIST" operator. The information in Tables 3A and 3B has been created for illustrative purposes. By setting the sorter and automatic document feeder (adf) in the second and third commands to the copier to be activated, no response from the copier is generated. In response to the get configuration command, there is a report generated from the copier in the second response from the copier. Also illustrated in Tables 3A and 3B are the getting and setting of a specific memory location A100. The last command in Table 3A is the setting of boot to A100. This means that upon rebooting or reinitialization of the copier, the memory location A100 is to be read.

In addition to the machines accessing the Internet through a LAN, the machine can alternatively access the Internet through a telephone line or ISDN via an Internet access provider or a dial-up service such as America On Line. In this manner, a machine that is not connected to a network can still use a connectionless mode of connection. In this case, the machine will have to periodically dial the Internet provider in order to receive incoming Internet e-mail messages.

Diagnostic and statistical information regarding the operation of a business office device or other machine might be considered confidential or proprietary information and therefore, people may not wish to have this information viewed by unauthorized people. The unauthorized viewing of transmitted data is a particular concern when information is transmitted over the Internet. Further, it is desirable to prevent the transmission of confidential information such as information from a machine or business office device which should not be remotely monitored, or information which is unrelated to the business office device over the Internet, with this information being disguised as diagnostic and status information of a business office device. The flowcharts of FIGS. 13A, 13B, and 14 illustrate processes for monitoring information transmitted from a company to a remote data center over the Internet, for example.

The information which is to be transmitted over the network originates from any one of the devices connected to the network 16 in FIG. 1 such as the printer 32, the facsimile machine 28, the digital copier/printer 24, any other type of machine or any of the workstations connected to the network 16. The information to be transmitted preferably originates from electromechanical sensors which are sensors which detect the state such as the mechanical state of the device or machine and output the sensed state electrically. The electro-mechanical sensors may be constructed not to have any moving parts and may be implemented, for example, as an optical sensor which detects the presence of paper, although the electromechanical sensor may detect any other feature of the business office device or machine and be implemented in any desired manner. The information is transmitted, for example as an e-mail message, through the firewall 14, over the Internet 10, and to a data center which processes and monitors the data of the business office device such as the workstation 42 through the firewall 40, or to any of the workstations connected to the network 52 through the firewall 50. The security center which monitors outgoing messages from the network 16 is implemented in any of the workstations connected to the network 16, or alternatively is implemented within the firewall mechanism 14.

In the process of FIGS. 13A and 13B, after starting, step 502 constructs a message to be transmitted in step 502 by a machine such as one of the business office devices 32, 28, or 24. This message is then encrypted in step 504 by one of the business office devices or by an alternative mechanism connected to the business office device. The encrypted message is then transmitted in step 506 to the intended destination such as a data center which monitors and processes received messages such as the workstation 42 or one of the workstations connected to the network 52, and is also transmitted to a security center, also referred to as a security device, which may be implemented using one of the workstations connected to the network 16, or within the firewall 14. The transmission of the message to both the security center and the data center ensures that the security center or security group receives the same message as was transmitted through the firewall 14 over the Internet. As an alternative, instead of the business office device sending the message to the security center, the firewall 14 sends a copy of the message passing therethrough to the security center to assure that the security center receives a true copy of the message sent over the Internet.

The outgoing message is stored in a log or database, preferably contained at the firewall 14 in step 508. This logging is performed so that the security center which also receives a copy of the message can check (in step 530 described below) that a copy of all outgoing messages are received. Within the intended destination such as the data center which processes the message to monitor, diagnose, and/or correct a machine from which the message originates, the encrypted information is received and decrypted in step 510, and processed in step 512 in order to monitor, diagnose and/or control the machine. At the same time, the encrypted message such as the e-mail message is received, decrypted, and stored in step 520 by the security center such as one of the workstations connected to the network 16, or alternatively the firewall 14. In step 522, the security center determines what information is being sent. In order to perform step 522, it is necessary to be able to decode the decrypted message, for example using a computer program executing on a general purpose computer. For example, the data transmitted from one of the business office devices may be in a binary form or other format which cannot be easily processed or understood by a human or machine. Therefore, it is necessary to determine, using the computer program, the real meaning of the data which is being sent.

Step 524 then determines if it is acceptable or permissible to transmit the information contained within the message which was encrypted in step 504. If this message is standard data describing the state of a business office device which does not have a high security concern and therefore can be remotely monitored, the data can be transmitted. Alternatively, if step 524 determines that it is not permissible to transmit the data, a warning is issued in step 526 such as a warning to a human monitor of a security device. Step 528 then prohibits future communications, if desired, from the machine which is transmitting the data. It is not permissible to transmit the data when the data is from a machine which should not be remotely monitored and/or controlled or the data contains confidential information which should not be transmitted. After an initial time period such as several days, a week, or a month, the checking of step 524 does not have to be performed for every transmitted message but outgoing messages may be checked randomly. This random checking will reduce the burden on a person checking the messages. However, if the outgoing messages are checked by a machine, it is preferable to monitor every outgoing message.

Step 530 then determines if the outgoing messages of the machines or office devices which are stored in the log at the firewall 14 have a corresponding message at the security center. When the security center is implemented as a device which is different from the firewall 14, if step 506 is properly performed each time such that the encrypted messages transmitted to both the intended destination such as the data center and the security center, the security center will have received a message corresponding to each message stored in the log at the firewall. However, if someone or a machine attempts to transmit an unauthorized message through the firewall 14, a log of this message will be kept whereas the security center will not receive a corresponding message. If step 530 determines that there is not a correspondence between the outgoing messages through the firewall 14 and the messages which have been received by the security center, flow proceeds to step 532 which issues a warning such as a warning to a human monitor of a security device by illuminating a warning lamp, generating an audible warning, or generating a computer message. Step 534 then prohibits future communications, if desired, from the machine which is transmitting data, prohibits all communications through the firewall, or performs a different type of security action. The process of FIGS. 13A and 13B then ends. Also, if step 530 determines that all logged messages passing through the firewall 14 have a corresponding entry at the security center, the process ends.

As an alternative to the steps illustrated in FIGS. 13A and 13B, instead of transmitting the encrypted message to both the intended destination and the security center at the same time in step 506, the message is first transmitted to the security center and transmission to the intended destination is delayed until it is determined that it is acceptable to transmit the information in steps 524 and 530.

As yet another alternative, step 524 monitors the e-mail addresses of the originating device and/or the destination device. If one or both of these addresses does not match a list of permissible addresses stored in a database, a warning is issued, future communications prohibited, and/or other actions taken to signal the occurrence of the attempted improper transmission.

FIG. 14 illustrates a second embodiment of monitoring outgoing transmissions. After starting, step 552 constructs the message to be transmitted by the printer 32, facsimile 28, digital copier/printer 24, or a device connected thereto. This message is transmitted in an unencrypted form to a security center in step 554 which is implemented in any of the workstations connected to the network 16 or within the firewall device 14. By sending the unencrypted message to the security center in step 554, the security center will have a reference which is subsequently compared, as described below, with the message passing through the firewall over the Internet to the data monitoring center.

Step 556 then encrypts the message to be transmitted, either at the machine such as the business office device or by another device connected to the business office device. The encrypted message is then transmitted to the firewall 14 in step 558. The firewall 14 forwards the encrypted message through the firewall over the Internet to the intended destination and also sends a copy of the encrypted message back to the security center. Step 561 then decrypts the message at the security center which was forwarded by the firewall 14. Step 562 then compares the message received from the business device which was transmitted in step 554 with the message received from the firewall 14. If it is determined that the messages are not the same, a warning such as a warning to a human operator is issued in step 564 and future communications are prohibited, if desired, or other security actions and preventive measures are taken in step 566. The process of FIG. 14 then ends. If step 562 determines that the message from the business device is the same as the message received at the firewall, the process of FIG. 14 ends. Alternatively, before the process of FIG. 14 ends, e.g., after step 562 results in an affirmative response or after step 566, a step of checking the contents of the outgoing message can be performed in a similar manner as steps 524, 526, and 528 of FIG. 13B are performed.

As an alternative to forwarding the encrypted message through the firewall over the Internet and at the same time sending a copy of the encrypted message to the security center, the encrypted message can be held at the firewall until the security center determines in step 562 that the message from the business office device is the same as the message copied from the firewall. This prevents an unauthorized communication from being transmitted through the firewall before it can be checked.

Different features of the security aspect of this invention are shown in the flowcharts of FIGS. 13A and 13B, and FIG. 14. The present invention includes embodiments having various combinations of features from each of the FIGS. 13A and 13B, and 14.

The security center which is described in the flowcharts of FIGS. 13 and 14 should be restricted to authorized personnel so that the security measures are not bypassed and properly implemented and that confidential data is not viewed by people who are not authorized. In the embodiments disclosed above, the message which is ultimately transmitted is either relayed by the security center, or alternatively, the security center receives a copy of the data and the data within the message is transmitted by the business office device. The invention also allows the security group to store and archive the outgoing messages in case the messages are ever needed, for example, to see if passed security breaches have occurred, or to monitor the history of the operation of the business office device.

This invention may be conventionally implemented using a conventional general purpose digital computer program according to the teachings of the present invention, as will be apparent to those skilled in the computer art. Appropriate software coding can readily be prepared by skilled programmers based on the teachings of the present disclosure, as will be apparent to those skilled in the software art. The invention may also be implemented by the preparation of application specific integrated circuits or by interconnecting an appropriate network of conventional component circuit, as will be readily apparent to those skilled in the art.

The present invention also includes a computer program product which is a storage medium including instructions which can be used to program a computer to perform a process of the invention. The storage medium can include, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, and magneto-optical disks, ROMS, RAMs, EPROMS, EEPROMs, magnetic or optical cards, or any type of media suitable for storing electronic instructions.

The above described system may used with conventional machines including conventional business office machines using add-on equipment constructed in accordance with the present teachings and installed in or outside of the machine.

Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein. 

What is claimed as new and desired to be secured by Letters Patent of the United States is:
 1. A method of processing communications from a machine having electro-mechanical sensors to a data center, comprising the steps of:creating a message containing information of the machine to be transmitted to the data center; transmitting the message from the machine to a firewall device; transmitting the message to a security device; and analyzing the message by the security device.
 2. A method according to claim 1, wherein the step of transmitting the message to the security device comprises:forwarding the message received by the firewall device to the security device.
 3. A method according to claim 1, further comprising the step of:performing a security action when the analyzing step determines that the message is not an authorized message.
 4. A method according to claim 1, wherein the step of performing a security action comprises:prohibiting the message from passing through the firewall.
 5. A method according to claim 1, wherein the step of performing a security action comprises:prohibiting future messages from passing through the firewall.
 6. A method according to claim 1, further comprising the step of:encrypting the message to be transmitted to the firewall device, before transmitting the message to the firewall device, the method further comprising the step of decrypting, by the security device, the encrypted message received from the firewall device.
 7. A method according to claim 1, further comprising the step of:logging messages into a log which are outgoing through the firewall device, wherein the step of analyzing comprises: comparing messages received at the security device with the log of the messages outgoing through the firewall device.
 8. A method according to claim 7, further comprising the step of:outputting a warning indicating that one of the messages sent to the security device does not match a corresponding one of the messages outgoing through the firewall device, when the step of comparing messages received at the security device determines that one of the messages outgoing through the firewall device does not match the corresponding message received by the security device.
 9. A method according to claim 1, wherein:the step of transmitting the message to the security device transmits the message to the security device which is part of the firewall device.
 10. A method according to claim 1, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine.
 11. A method according to claim 10, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine which is a business office device.
 12. A method according to claim 1, wherein the step of transmitting the message to the security device comprises:transmitting the message from the firewall device to the security device, said method further comprising the step of: transmitting the message from the machine to the security device, wherein the step of analyzing comprises: comparing, by the security device, the message received by the security device from the machine with the message received by the security device from the firewall device.
 13. A method according to claim 12, further comprising the step of:encrypting the message to be transmitted to the firewall device, before transmitting the message to the firewall device, wherein the step of transmitting the message from the firewall device to the security device comprises transmitting the encrypted message, the method further comprising the step of decrypting, by the security device, the encrypted message received from the firewall device, wherein the step of comparing comprises comparing the message received by the machine with the message which has been decrypted.
 14. A method according to claim 13, wherein the step of transmitting the message from the machine to the security device comprises:transmitting the message in an unencrypted form.
 15. A method according to claim 12, further comprising the step of:logging messages which are outgoing through the firewall device; and comparing messages received at the security device with messages transmitted through the firewall device which have been logged.
 16. A method according to claim 15, further comprising the step of:outputting a warning indicating that one of the messages sent to the security device does not match a corresponding one of the messages outgoing through the firewall device, when the step of comparing messages received at the security device determines that one of the messages outgoing through the firewall device does not match the corresponding message received by the security device.
 17. A method according to claim 12, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine.
 18. A method according to claim 17, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine which is a business office device.
 19. A method according to claim 1, further comprising the step of:creating a log of messages passing through the firewall device from machines, wherein the step of analyzing comprises: comparing, by the security device, messages received from the machine with the log of messages passing through the firewall device.
 20. A method according to claim 19, further comprising the step of:outputting a warning when one of the messages received from the machine does not correspond to the log of messages passing through the firewall device.
 21. A method according to claim 19, further comprising the step of:prohibiting further messages from the machine from passing through the firewall device, when said one of the messages received from the machine is determined not to exist in the log of messages passing through the firewall device by the comparing step.
 22. A method according to claim 19, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine.
 23. A method according to claim 22, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine which is a business office device.
 24. A method according to claim 1, further comprising the step of:encrypting the message, before the message is transmitted to the firewall device and transmitted to the security device, wherein the step of transmitting to the firewall device comprises transmitting the encrypted message to the firewall device, wherein the step of transmitting to the security device comprises transmitting the encrypted message to the firewall device, the method further comprising the step of: decrypting the message by the security device, wherein the analyzing step comprises analyzing contents of the message which has been decrypted.
 25. A method according to claim 24, further comprising the step of:decoding the decrypted message, wherein the analyzing step comprises: analyzing the contents of the messages which have been decrypted and decoded.
 26. A method according to claim 24, wherein the analyzing step comprises:determining if the contents of the message are from a machine which is permitted to communicate with the data center.
 27. A method according to claim 24, wherein the analyzing step comprises:determining if the contents of the message contain only information which is authorized to be transmitted to the data center.
 28. A method according to claim 24, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine.
 29. A method according to claim 28, wherein:the step of creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine which is a business office device.
 30. A system of processing communications, comprising:a machine having electromechanical sensors for generating messages and transmitting the messages to a data center; a firewall device; a security device; a network connecting the machine, the firewall device, the security device, and the data center; means, disposed in the machine, for creating a message containing information of the machine to be transmitted to the data center; means for transmitting the message from the machine to a firewall device; means for transmitting the message to a security device; and means, disposed within the security device, for analyzing the message.
 31. A system according to claim 30, wherein the means for transmitting the message to the security device comprises:means for forwarding the message received by the firewall device to the security device.
 32. A system according to claim 30, further comprising:means for performing a security action when the means for analyzing determines that the message is not an authorized message.
 33. A system according to claim 30, wherein the means for performing a security action comprises:means for prohibiting the message from passing through the firewall.
 34. A system according to claim 30, wherein the means for performing a security action comprises:means for prohibiting future messages from passing through the firewall.
 35. A system according to claim 30, further comprising:means for encrypting the message to be transmitted to the firewall device; and means for decrypting, within the security device, the encrypted message received from the firewall device.
 36. A system according to claim 30, further comprising:means for logging messages into a log which are outgoing through the firewall device, wherein the means for analyzing comprises: means for comparing messages received at the security device with the log of the messages outgoing through the firewall device.
 37. A system according to claim 36, further comprising:means for outputting a warning indicating that one of the messages sent to the security device does not match a corresponding one of the messages outgoing through the firewall device, when the means for comparing messages received at the security device determines that one of the messages outgoing through the firewall device does not match the corresponding message received by the security device.
 38. A system according to claim 30, wherein:the means for transmitting the message to the security device transmits the message to the security device which is part of the firewall device.
 39. A system according to claim 30, wherein the means for creating a message comprises:means for creating the message to contain information received from the electro-mechanical sensors of the machine.
 40. A system according to claim 39, wherein:the means for creating a message comprises creating the message to contain information received from the electromechanical sensors of the machine which is a business office device.
 41. A system according to claim 30, wherein the means for transmitting the message to the security device comprises:means for transmitting the message from the firewall device to the security device, said system further comprising: means for transmitting the message from the machine to the security device, wherein the means for analyzing comprises: means for comparing, by the security device, the message received by the security device from the machine with the message received by the security device from the firewall device.
 42. A system according to claim 41, further comprising:means for encrypting the message to be transmitted to the firewall device, before transmitting the message to the firewall device, wherein the means for transmitting the message from the firewall device to the security device comprises: means for transmitting the encrypted message, the system further comprising: means for decrypting, by the security device, the encrypted message received from the firewall device, wherein the means for comparing comprises: means for comparing the message received by the machine with the message which has been decrypted.
 43. A system according to claim 42, wherein the means for transmitting the message from the machine to the security device comprises:means for transmitting the message in an unencrypted form.
 44. A system according to claim 42, wherein the means for creating a message comprises:means for creating the message to contain information received from the electromechanical sensors of the machine.
 45. A system according to claim 44, wherein the means for creating a message comprises:means for creating the message to contain information received from the electromechanical sensors of the machine which is a business office device.
 46. A system according to claim 41, further comprising:means for logging messages which are outgoing through the firewall device; and means for comparing messages received at the security device with messages transmitted through the firewall device which have been logged.
 47. A system according to claim 46, further comprising:means for outputting a warning indicating that one of the messages sent to the security device does not match a corresponding one of the messages outgoing through the firewall device, when the means for comparing messages received at the security device determines that one of the messages outgoing through the firewall device does not match the corresponding message received by the security device.
 48. A system according to claim 30, further comprising:means for creating a log of messages passing through the firewall device from machines, wherein the means for analyzing comprises: means for comparing, by the security device, messages received from the machine with the log of messages passing through the firewall device.
 49. A system according to claim 48, further comprising:means for outputting a warning when one of the messages received from the machine does not correspond to the log of messages passing through the firewall device.
 50. A system according to claim 48, further comprising:means for prohibiting further messages from the machine from passing through the firewall device, when said one of the messages received from the machine is determined not to exist in the log of messages passing through the firewall device by the means for comparing.
 51. A system according to claim 48, wherein the means for creating a message comprises:means for creating the message to contain information received from the electromechanical sensors of the machine.
 52. A system according to claim 51, wherein the means for creating a message comprises:means for creating the message to contain information received from the electromechanical sensors of the machine which is a business office device.
 53. A system according to claim 30, further comprising:means for encrypting the message, before the message is transmitted to the firewall device and transmitted to the security device, wherein the means for transmitting to the firewall device comprises means for transmitting the encrypted message to the firewall device, wherein the means for transmitting to the security device comprises means for transmitting the encrypted message to the firewall device, the system further comprising: means for decrypting the message by the security device, wherein the means for analyzing comprises means for analyzing contents of the message which has been decrypted.
 54. A system according to claim 53, further comprising:means for decoding the decrypted message, wherein the means for analyzing comprises: means for analyzing the contents of the messages which have been decrypted and decoded.
 55. A system according to claim 53, wherein the means for analyzing comprises:means for determining if the contents of the message are from a machine which is permitted to communicate with the data center.
 56. A system according to claim 53, wherein the means for analyzing comprises:means for determining if the contents of the message contain only information which is authorized to be transmitted to the data center.
 57. A system according to claim 53, wherein the means for creating a message comprises:means for creating the message to contain information received from the electromechanical sensors of the machine.
 58. A system according to claim 57, wherein the means for creating a message comprises:means for creating the message to contain information received from the electromechanical sensors of the machine which is a business office device. 